Machine for drawing metal.



No. 678,753; Patented luly l6, 1am.

I w. A. menu. MACHINE FOR DRAWING METAL.

(Application filed Jan. 20, 1899.)

UNITED TATES ,Arniur rricn.

WILLIAM A. MOCOOL, OF BEAVERFALLS, PENNSYLVANIA, ASSIGNOR, BY

MESNE ASSIGNMENTS, TO SHELBY STEEL TUBE COMPANY, OF CLEVE- LAND, OHIO.

MACHINE FORYD RAWING METAL.

SPECIFICATION forming part of Letters Patent No. 678,753, dated July 16,1901. Application filed January 20, 1899. Serial No. 702,809. (Nomodel.)

To all whom it may concern.-

Be it known that 1, WILLIAM A. MoOooL, a citizen of the United States,residing at Beaverfalls, in the county of Beaver and State ofPennsylvania, have invented certain new and useful Improvements inMachines for Drawing Metal, of which the following is a specification,reference being had therein to the accompanying drawings.

Figure 1 is a plan view of a sufficient portion of adrawing-bench toillustrate the manner of applying my improvement. Fig. 2 is a side viewof parts of the same, some parts being shown in section. Fig. 3 is aside view of the tube-support detached. Fig. 4: is a cross-section ofthe bench on the line or 00, Fig. 1. Fig. 5 is a cross-section on theline y y, Fig. 1. Fig. 6 is a section of a part of the tube-support.Fig. 7 is a section of the cue.

In the drawings I have indicated at A A parts of the bed-frame of thedrawing-bench, which latter as an entirety may be of any known orpreferred form, these parts A A being specifically here the side railswhich support the die-holder and also support the carriage by which thetube is propelled through the die. The die-holder as a whole isindicated by B, it having a hub 0r bearing B at its upper end and a bossor die holder at C. It has outwardly-projecting arms I), which rest uponthe top flanges a of the bedbars A, and fastening-plates b, which aresecured to the vertical parts A of the framebars.

D indicates more or less conventionally a die which is inserted in thepart 0 of the support B, this die being the external tool by which theouter surface of the tubing is shaped.

E and F indicate, respectively, carriages by which the tube is graspedand propelled,

that at E being used initially for grasping'the tube I and pushing itmore or-less through the die D and that at F being subsequently utilizedto grasp the forward or protruding end l'of the tube and draw it onwardthrough the die. Each of these carriages has a tubeengaging part at Gand a base portion G, which engages with the cable H or other device foradvancing the tubing. At 9 there is a hand-lever for effecting theengagement of the carriage with the tube and at g" a hand lever forconnecting the carriage to the cable and disconnecting it therefrom.However, these parts and the details thereof have formed thesubject-matter of earlier patents and need not, therefore, be herefurther described in detail.

One of the serious difficulties met with in manipulating tubes in thisprocess of colddrawing them grows out of the fact that when the forwardend of the tube is forced through the die it tends to be curled, bent,displaced, or thrust out of proper lines, and there results not only anundesirable action upon the metal, but trouble in properly grasping thetube by the carriage upon the draft side of the die. To obviate this, Ihave devised the following mechanism: J indicates an arm provided withsuitable means for receiving, supporting, and steadying the advancingend of the tube I as it emerges from the die under the action of thepressure-carriage E and arranged in suitable way to advance with thetube and continue to hold it steadily in position in proper line. Atthelower end this arm J has a tubular eyepiece j with a socket oraperture in alinement with the path of the tube. Preferably it has anenlarged aperture, into which is inserted a removable holder-piece M,the latter having sockets, as shown at m m which are concentric with thetube and adapted to have the edge of the front end seated firmlytherein. The arm J is curved, as at J, so as to bring this supportingpart 3' close into the delivery side of the die in order that theadvancing front edge may be immediately caught and guided. The holderadvances under the pressure of the tube, it having a stem K, which canmove loosely longitudinally through the hub 13. As shown, the arm J isformed with a split collar or eye j at the upper end, which can betightly clamped by binding-screws j, accurate adjustment around its axisbeing in this way permitted. The stem K is prevented from rocking ormoving axially, and the holder 7' is thus kept in line. This is effectedby forming a longitudinal groove 7.:

in the stem K and fitting therein a pin Z, which acts as a spline orfeather.

It is desirable at times to hold the tubesupport out of line, which isattained by form ing a supplemental groove 75 in the stem and arrangingthe pin Z so that it can be withdrawn from the groove 7t and then seatedin the groove 7t after the stem K has been turned out of its operativeposition. To hold the pill Z in either of its two positions, (in grooveIt or 7d,) use is made of a spring L, which normally tends to press thepin Zinward, but at the same time permits it readily to be withdrawn.

The mode of operation of the devices above described will be readilyunderstood. A tube I is first clamped in the gripper part G of thecarrier E, and then the carriage is clamped to the cable H or propellingdevice. Thereupon the forward end of the tube is forced into and throughthe die D, the latter being of such dimensions as to produce thediameterof the tube as desired. Immediately upon the protruding of theforward end of the tube through the die it is received by and seatsitself in the socket m of the holder J M. Twisting, bending, ormisalinement of the tube is prevented. The onward advance of the tubepushes the parts M, J, and K forward with it to or toward the dottedposition shown in Figs. 1 and 2. By this time a sufficient portion ofthe tube has passed through the die to be engaged by the draft-carriageF. Then the operator draws back the spring L and pin Z, turns the arm Jup to the position shown in Fig. 5, and allows the pin Z to again bepressed inward, it seating itself now in groove 7c and holding the partsJ and M out of the lines of the tube. Then the carriage G is engagedwith the tube, and the latter is connected to the cable, and the drawingprocess is completed.

The tube receiver and holder M is preferably detachable and reversible,it having sockets m and 071., one at each end. To permit it to bereadily withdrawn and reversed or replaced by another, there is a pin Ndetachably carried by the arm J and adapted to seat itself in the grovem,-formed in the periphery of the holder lWI. While I have shown anddescribed these devices in connection with the drawing of tubing, I donot mean to limit my invention to such articles, as it can be embodiedin various Ways and operate substantially similarly when drawingmodified articles, such as solid bars, rods, and the like.

As has been pointed out heretofore in this specification, the holder andguide for the end of the article which emerges from the die is arrangedin immediate proximity to the emerging face of the die, and in thisrespect it differs from the article engaging or grasping devices on theemerging side of the die, which constitutes a part of the drawingmechanism, as such drawing devices are situated at a considerabledistance from the face of the die. Further, as has been pointed outheretofore in the specification, the guide and holder is freely movable,and in this respect also it differs from the drawing devices, which areactuated by an impelling force other than that of the advancing article.My freely-movable holder and guide is also different in function andconstruction from the yielding abutments which are sometimes employed inthe manufacture of certain ponderous articles, such as projectiles forheavy ordnance, and which abutments, under the impelling force of strongsprings or equiva lent strong but yielding forces, bear against thearticles being formed while they are being acted upon by steam-hammersor reducingrolls. Such abutments do not guide the articles beingproduced after emerging from the shaping-tools, but merely serve to holdthem in place between the tools, and they are not freely movable, butare rather acted upon by tremendously powerful forces.

What I claim is- 1. In a machine for drawing metal, the combination withthe die, the die-holder and the drawing devices, of a movable guide forthe forward end of the metallic article, arranged to lie immediatelyadjacent to the emerging face of the die, so as to receive the end ofthe-article as soon as it emerges from the die, and a support for theguide arranged to direct its movements, and in which it is free to move,whereby it advances with the forward movement of the article, and servesto hold and guide the same, substantially as set forth. 1

2. In a metal-drawing machine, the combi nation with the die, thedie-holder and means for propelling the metal articles through the die,of the movable holder supported independently of the propelling meansand adapted to receive and support the. front end of the article beingdrawn, and adapted to be moved into and out of alinement with saidarticle, and means for guiding said holder in the direction desired tobe taken by the end of the tube, substantially as set forth.

3. In a machine for drawing metal articles, the combination with thedie, the die-holder and the devices for propelling the article throughthe die, of the longitudinally-moving holder for said articles adaptedto be rotated to and from the path of the articles being drawn and meansfor guiding said holder rectilinearly, substantially as set forth.

4:. In a machine for drawing metal articles, the combination with thedie, the die-holder and the means for propelling through the die thearticles to be drawn, of the holder for the front ends of said articlessuccessively, freely movable with and by the action of the drawingdevices at the opposite side of the die and having a detachable receiverfor receiving said front ends, substantially as set forth.

5. The combination with the draw-bench, and the die, of the holdingdevice having the 7. The combination with the draw-benchand the die, ofthe longitudinally-movable holder freely movable with and by the actionof the drawing devices at the opposite side of the die and adapted to bepositively held in a position in alinement with the article being drawn,and in a position out of such alinement, substantially as set forth.

8. In a machine for drawing metal the combination of a die, thefreely-sliding holder arranged immediately adjacent to the face of thedie from which the article emerges, and means at the other side of saiddie for forcing through it a tube or bar and sliding said holder by theend pressure of such rod or bar, the latter being guided by said holder.

9. In a machine for drawing metal the combination of a die, afreely-sliding holder at one side of the same, guiding devices for saidholder comprising fixed and movable parts the fixed part being connectedwith the die, and means at the other side of said die for forcingthrough it a tube or bar and operat-* ing said holder by the endpressure of such rod or bar, the latter being guided by said holder.

10. In a machine for drawing metal, the combination of a die, thedrawing devices for engaging with and moving the article to be drawn,arranged upon opposite sides of the die, and a guide-holder for theforward end of the article, arranged between the die and the drawingdevices on the emerging side of the die, and adapted to guide theforward end of the article as it moves from the die toward the last saiddrawing devices, substantially as set forth. 7

11. In a machine for drawing metal, the combination of a die, thedrawing devices arranged to engage with and move the article, andsituated upon opposite sides of the die, and a guide for the forward endof the article, situated between the die and the drawing devices on theemerging side of the die and arranged to guide the forward end of thearticle as it moves from the die toward the said drawing devices, thesaid guide and holder being movable into and out of the path of thearticle, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

YVILLIAM. A. MOOOOL.

Vitnesses:

J AMES F. MERRIMAN, RICHARD B. OAvANAcH.

